/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineMessageInterface.h
Interface class for enumerating/sending/receiving messages between users
class IOnlineMessage
FOnDeleteMessag...
OnDeleteMessageCompleteDelegates
Delegate used when deleting a message has completed
FOnEnumerateMes...
OnEnumerateMessagesCompleteDelegates
Delegate used when the enumeration of message headers has completed
FOnReadMessageC...
OnReadMessageCompleteDelegates
Delegate used when downloading of message contents has completed
FOnSendMessageC...
OnSendMessageCompleteDelegates
Delegate used when sending of message has completed